[Amoeba Sisters] Meiosis

Meiosis results in (a)   which makes siblings different from each other even if they’re from the same parents.

Which of the following is INCORRECT about reduction division in humans?

• Starting cell has more chromosomes than ending cells

• Starting cells in males are called primary spermatocytes

• Starting cells in females are called primary oocytes

• Starting cells have 23 chromosomes while ending cells have 46 chromosomes

Select the FALSE statement about chromosomes.

• Chromosomes are condensed, organized units of DNA and protein in the nucleus of a cell

• Chromosomes are counted by the number of chromatids present

• Chromatids are strands of replicated chromosomes

• The centromere of the chromosome is the part where sister chromatids are held together

What does NOT happen to homologous chromosomes during prophase I?

• They are duplicated

• They pair up

• Crossing over occurs

• They exchange genetic information with each other

Which part of meiosis I is described INCORRECTLY?

• Chromosomes condense and thicken during prophase I

• Homologous pairs line up at the center during metaphase I

• Sister chromatids are pulled away from each other during anaphase I

• 2 new cells result after telophase I

Which is INCORRECT about the difference between meiosis I and meiosis II?

• Homologous pairs line up at metaphase I, while in metaphase II there is a single line of chromosomes

• Homologous pairs are pulled away from each other during anaphase I, while sister chromatids are pulled away from each other during anaphase II

• The chromosome count at the end of meiosis I is 46, while the chromosome number count at the end of meiosis II is 23.

• Meiosis I results in 2 new cells, while in meiosis II 4 new cells result from the starting cell

Which is FALSE about nondisjunction?

• This involves homologous chromosomes not separating correctly

• This involves sister chromatids not separating correctly

• This results in cells receiving too many chromosomes

• This results in cells receiving too few chromosomes

• This is results in genetic variety, which explains why siblings are different even if they are from the same parents